<template>
    <div>
        <!-- 面包屑导航区域 -->
        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>数据统计</el-breadcrumb-item>
            <el-breadcrumb-item>数据报表</el-breadcrumb-item>
        </el-breadcrumb>
        <!-- 卡片视图区域 -->
        <el-card>
            <!-- 2.为 ECharts 准备一个定义了宽高的 DOM -->
            <div id="main" style="width: 900px;height:400px;"></div>

        </el-card>
    </div>
</template>
<script>
    //1.导入echarts
    import * as echarts from 'echarts'
    import _ from 'lodash'
    export default {
        data() {
            return {
                //需要合并的配置对象
                options: {
                    title: {
                        text: '用户来源'
                    },
                    tooltip: {
                        trigger: 'axis',
                        axisPointer: {
                            type: 'cross',
                            label: {
                                backgroundColor: '#E9EEF3'
                            }
                        }
                    },
                    grid: {
                        left: '3%',
                        right: '4%',
                        bottom: '3%',
                        containLabel: true
                    },
                    xAxis: [{
                        boundaryGap: false
                    }],
                    yAxis: [{
                        type: 'value'
                    }]
                }

            }
        },
        created() {

        },
        async mounted() {
            // 3.基于准备好的dom，初始化echarts实例
            var myChart = echarts.init(document.getElementById('main'));
            const {
                data: res
            } = await this.$http.get('reports/type/1');
            console.log(res);
            if (res.meta.status !== 200) {
                return this.$message.error('获取折线图数据失败');
            }
            //使用loadsh的merge方法合并res.data和option赋值给新的变量接受
            const result = _.merge(res.data, this.options)


            // 5.使用刚指定的配置项和数据显示图表。
            myChart.setOption(result);

        },
        methods: {

        }
    }
</script>
<style lang="less" scoped>

</style>